Contraction velocity influence the magnitude and etiology of neuromuscular fatigue during repeated maximal contractions.
Identifieur interne : 002F95 ( Main/Exploration ); précédent : 002F94; suivant : 002F96Contraction velocity influence the magnitude and etiology of neuromuscular fatigue during repeated maximal contractions.
Auteurs : B. Morel [France] ; M. Clémençon [France] ; S. Rota [France] ; G Y Millet [Canada] ; D J Bishop [Australie] ; O. Brosseau [France] ; D M Rouffet [Australie] ; C A Hautier [France]Source :
- Scandinavian journal of medicine & science in sports [ 1600-0838 ] ; 2015.
Descripteurs français
- KwdFr :
- Consommation d'oxygène, Contraction isométrique (physiologie), Effort physique (physiologie), Facteurs temps, Fatigue musculaire (physiologie), Humains, Jeune adulte, Jonction neuromusculaire (physiopathologie), Moment de torsion, Motoneurones (physiologie), Muscle quadriceps fémoral (physiopathologie), Mâle, Nerf fémoral (physiologie), Stimulation électrique, Échanges gazeux pulmonaires, Électromyographie.
- MESH :
- physiologie : Contraction isométrique, Effort physique, Fatigue musculaire, Motoneurones, Nerf fémoral.
- physiopathologie : Jonction neuromusculaire, Muscle quadriceps fémoral.
- Consommation d'oxygène, Facteurs temps, Humains, Jeune adulte, Moment de torsion, Mâle, Stimulation électrique, Échanges gazeux pulmonaires, Électromyographie.
English descriptors
- KwdEn :
- Electric Stimulation, Electromyography, Femoral Nerve (physiology), Humans, Isometric Contraction (physiology), Male, Motor Neurons (physiology), Muscle Fatigue (physiology), Neuromuscular Junction (physiopathology), Oxygen Consumption, Physical Exertion (physiology), Pulmonary Gas Exchange, Quadriceps Muscle (physiopathology), Time Factors, Torque, Young Adult.
- MESH :
- physiology : Femoral Nerve, Isometric Contraction, Motor Neurons, Muscle Fatigue, Physical Exertion.
- physiopathology : Neuromuscular Junction, Quadriceps Muscle.
- Electric Stimulation, Electromyography, Humans, Male, Oxygen Consumption, Pulmonary Gas Exchange, Time Factors, Torque, Young Adult.
Abstract
This study aimed to compare the magnitude and etiology of neuromuscular fatigue during maximal repeated contractions performed in two contraction modes (concentric vs isometric) and at two contraction velocities (30/s vs 240°/s). Eleven lower limb-trained males performed 20 sets of maximal contractions at three different angular velocities: 0°/s (KE0), 30/s (KE30), and 240°/s (KE240). Cumulated work, number of contraction, duty cycle, and contraction time were controlled. Torque, superimposed and resting twitches, as well as gas exchange, were analyzed. Increasing contraction velocity was associated with greater maximal voluntary torque loss (KE0: -9.8 ± 3.9%; KE30: -16.4 ± 8.5%; KE240: -32.6 ± 6.3%; P < 0.05). Interestingly, the torque decrease was similar for a given cumulated work. Compared with KE0, KE240 generated a greater evoked torque loss (Db100: -24.3 ± 5.3% vs -5.9 ± 6.9%; P < 0.001), a higher O2 consumption (23.7 ± 6.4 mL/min/kg vs 15.7 ± 3.8 mL/min/kg; P < 0.001), but a lower voluntary activation (VA) loss (-4.3 ± 1.6% vs -11.2 ± 4.9%; P < 0.001). The neuromuscular perturbations were intermediate for KE30 (Db100: -10.0 ± 6.8%; VA: -7.2 ± 2.8%). Although the amount of mechanical work cumulated strongly determined the magnitude of torque decrease, the contraction velocity and mode influenced the origin of the neuromuscular fatigue. The metabolic stress and peripheral fatigue increased but reduction of VA is attenuated when the contraction velocity increased from 0°/s to 240°/s.
DOI: 10.1111/sms.12358
PubMed: 25556533
Affiliations:
- Australie, Canada, France
- Alberta, Auvergne-Rhône-Alpes, Rhône-Alpes
- Calgary, Lyon, Villeurbanne
- Université de Calgary
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Morel</name><affiliation wicri:level="3"><nlm:affiliation>Center of Research and Innovation on Sport, University of Lyon 1, Villeurbanne, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Center of Research and Innovation on Sport, University of Lyon 1, Villeurbanne</wicri:regionArea><placeName><region type="region" nuts="2">Auvergne-Rhône-Alpes</region><region type="old region" nuts="2">Rhône-Alpes</region><settlement type="city">Villeurbanne</settlement><settlement type="city" wicri:auto="agglo">Lyon</settlement></placeName></affiliation></author><author><name sortKey="Clemencon, M" sort="Clemencon, M" uniqKey="Clemencon M" first="M" last="Clémençon">M. Clémençon</name><affiliation wicri:level="3"><nlm:affiliation>Center of Research and Innovation on Sport, University of Lyon 1, Villeurbanne, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Center of Research and Innovation on Sport, University of Lyon 1, Villeurbanne</wicri:regionArea><placeName><region type="region" nuts="2">Auvergne-Rhône-Alpes</region><region type="old region" nuts="2">Rhône-Alpes</region><settlement type="city">Villeurbanne</settlement><settlement type="city" wicri:auto="agglo">Lyon</settlement></placeName></affiliation></author><author><name sortKey="Rota, S" sort="Rota, S" uniqKey="Rota S" first="S" last="Rota">S. 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Brosseau</name><affiliation wicri:level="1"><nlm:affiliation>Maison des Consultants - Médipôle, Bourgoin-Jailleux, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Maison des Consultants - Médipôle, Bourgoin-Jailleux</wicri:regionArea><wicri:noRegion>Bourgoin-Jailleux</wicri:noRegion><wicri:noRegion>Bourgoin-Jailleux</wicri:noRegion></affiliation></author><author><name sortKey="Rouffet, D M" sort="Rouffet, D M" uniqKey="Rouffet D" first="D M" last="Rouffet">D M Rouffet</name><affiliation wicri:level="1"><nlm:affiliation>Institute of Sport, Exercise and Active Living, Victoria University, Melbourne, Victoria, Australia.</nlm:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>Institute of Sport, Exercise and Active Living, Victoria University, Melbourne, Victoria</wicri:regionArea><wicri:noRegion>Victoria</wicri:noRegion></affiliation></author><author><name sortKey="Hautier, C A" sort="Hautier, C A" uniqKey="Hautier C" first="C A" last="Hautier">C A Hautier</name><affiliation wicri:level="3"><nlm:affiliation>Center of Research and Innovation on Sport, University of Lyon 1, Villeurbanne, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Center of Research and Innovation on Sport, University of Lyon 1, Villeurbanne</wicri:regionArea><placeName><region type="region" nuts="2">Auvergne-Rhône-Alpes</region><region type="old region" nuts="2">Rhône-Alpes</region><settlement type="city">Villeurbanne</settlement><settlement type="city" wicri:auto="agglo">Lyon</settlement></placeName></affiliation></author></analytic><series><title level="j">Scandinavian journal of medicine & science in sports</title><idno type="eISSN">1600-0838</idno><imprint><date when="2015" type="published">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Electric Stimulation</term><term>Electromyography</term><term>Femoral Nerve (physiology)</term><term>Humans</term><term>Isometric Contraction (physiology)</term><term>Male</term><term>Motor Neurons (physiology)</term><term>Muscle Fatigue (physiology)</term><term>Neuromuscular Junction (physiopathology)</term><term>Oxygen Consumption</term><term>Physical Exertion (physiology)</term><term>Pulmonary Gas Exchange</term><term>Quadriceps Muscle (physiopathology)</term><term>Time Factors</term><term>Torque</term><term>Young Adult</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Consommation d'oxygène</term><term>Contraction isométrique (physiologie)</term><term>Effort physique (physiologie)</term><term>Facteurs temps</term><term>Fatigue musculaire (physiologie)</term><term>Humains</term><term>Jeune adulte</term><term>Jonction neuromusculaire (physiopathologie)</term><term>Moment de torsion</term><term>Motoneurones (physiologie)</term><term>Muscle quadriceps fémoral (physiopathologie)</term><term>Mâle</term><term>Nerf fémoral (physiologie)</term><term>Stimulation électrique</term><term>Échanges gazeux pulmonaires</term><term>Électromyographie</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Contraction isométrique</term><term>Effort physique</term><term>Fatigue musculaire</term><term>Motoneurones</term><term>Nerf fémoral</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Femoral Nerve</term><term>Isometric Contraction</term><term>Motor Neurons</term><term>Muscle Fatigue</term><term>Physical Exertion</term></keywords><keywords scheme="MESH" qualifier="physiopathologie" xml:lang="fr"><term>Jonction neuromusculaire</term><term>Muscle quadriceps fémoral</term></keywords><keywords scheme="MESH" qualifier="physiopathology" xml:lang="en"><term>Neuromuscular Junction</term><term>Quadriceps Muscle</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Electric Stimulation</term><term>Electromyography</term><term>Humans</term><term>Male</term><term>Oxygen Consumption</term><term>Pulmonary Gas Exchange</term><term>Time Factors</term><term>Torque</term><term>Young Adult</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Consommation d'oxygène</term><term>Facteurs temps</term><term>Humains</term><term>Jeune adulte</term><term>Moment de torsion</term><term>Mâle</term><term>Stimulation électrique</term><term>Échanges gazeux pulmonaires</term><term>Électromyographie</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">This study aimed to compare the magnitude and etiology of neuromuscular fatigue during maximal repeated contractions performed in two contraction modes (concentric vs isometric) and at two contraction velocities (30/s vs 240°/s). Eleven lower limb-trained males performed 20 sets of maximal contractions at three different angular velocities: 0°/s (KE0), 30/s (KE30), and 240°/s (KE240). Cumulated work, number of contraction, duty cycle, and contraction time were controlled. Torque, superimposed and resting twitches, as well as gas exchange, were analyzed. Increasing contraction velocity was associated with greater maximal voluntary torque loss (KE0: -9.8 ± 3.9%; KE30: -16.4 ± 8.5%; KE240: -32.6 ± 6.3%; P < 0.05). Interestingly, the torque decrease was similar for a given cumulated work. Compared with KE0, KE240 generated a greater evoked torque loss (Db100: -24.3 ± 5.3% vs -5.9 ± 6.9%; P < 0.001), a higher O2 consumption (23.7 ± 6.4 mL/min/kg vs 15.7 ± 3.8 mL/min/kg; P < 0.001), but a lower voluntary activation (VA) loss (-4.3 ± 1.6% vs -11.2 ± 4.9%; P < 0.001). The neuromuscular perturbations were intermediate for KE30 (Db100: -10.0 ± 6.8%; VA: -7.2 ± 2.8%). Although the amount of mechanical work cumulated strongly determined the magnitude of torque decrease, the contraction velocity and mode influenced the origin of the neuromuscular fatigue. The metabolic stress and peripheral fatigue increased but reduction of VA is attenuated when the contraction velocity increased from 0°/s to 240°/s.</div></front></TEI><affiliations><list><country><li>Australie</li><li>Canada</li><li>France</li></country><region><li>Alberta</li><li>Auvergne-Rhône-Alpes</li><li>Rhône-Alpes</li></region><settlement><li>Calgary</li><li>Lyon</li><li>Villeurbanne</li></settlement><orgName><li>Université de Calgary</li></orgName></list><tree><country name="France"><region name="Auvergne-Rhône-Alpes"><name sortKey="Morel, B" sort="Morel, B" uniqKey="Morel B" first="B" last="Morel">B. Morel</name></region><name sortKey="Brosseau, O" sort="Brosseau, O" uniqKey="Brosseau O" first="O" last="Brosseau">O. Brosseau</name><name sortKey="Clemencon, M" sort="Clemencon, M" uniqKey="Clemencon M" first="M" last="Clémençon">M. Clémençon</name><name sortKey="Hautier, C A" sort="Hautier, C A" uniqKey="Hautier C" first="C A" last="Hautier">C A Hautier</name><name sortKey="Rota, S" sort="Rota, S" uniqKey="Rota S" first="S" last="Rota">S. Rota</name></country><country name="Canada"><region name="Alberta"><name sortKey="Millet, G Y" sort="Millet, G Y" uniqKey="Millet G" first="G Y" last="Millet">G Y Millet</name></region></country><country name="Australie"><noRegion><name sortKey="Bishop, D J" sort="Bishop, D J" uniqKey="Bishop D" first="D J" last="Bishop">D J Bishop</name></noRegion><name sortKey="Rouffet, D M" sort="Rouffet, D M" uniqKey="Rouffet D" first="D M" last="Rouffet">D M Rouffet</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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